approving changes in senate rules last night to reduce political gridlock. the bill was also introduced to ban assault weapons. >>> manti te'o says the voice he received from an imaginary online girlfriend the night she supposedly died convinced him she was real and dying from leukemia. >> i just want to say i love you and good night. and i'll be okay tonight. love you so much, hon. sweet dreams. >> reporter: he said he set aside any doubts that the girlfriend could be a hoax because he felt she needed his emotional support. >>> federal investigators say the boeing 787 dreamliner battery that caught fire earlier this month in boston showed evidence of short circuiting, and a chemical reaction that can cause temperature increases. however, they say it's not clear what came first or what caused either problem. the faa has grounded all six dreamliners operated by u.s. carriers after another battery failure forced an emergency landing in japan. >>> and now for a look at what is trending today. a quick roundup of what has you talking online. sports fans investiga